基于CSLE模型的川西地区土壤侵蚀时空变化定量研究
Quantitative study on spatiotemporal changes of soil erosion in western Sichuan based on CSLE model
徐庆 1杨军 2李亮 1薛鹏1
作者信息
- 1. 自然资源部第六地形测量队,四川 成都 610500
- 2. 西昌市邛海国家湿地公园保护中心,四川 西昌 615000
- 折叠
摘要
为全面评估川西地区水土流失变化情况,为该区生态环境保护和资源开发提供决策支撑、水土流失数据支持,开展水土流失变化监测技术研究.利用四川省基础性地理国情监测和国土变更调查数据,基于中国水土流失方程(CSLE)模型对川西地区 32 县(市)2019―2022 年土壤侵蚀情况进行监测,结果表明:2019―2022 年间全区平均土壤侵蚀模数减少 16.88 t/(km2·a),土壤侵蚀总量减少 415.09 万t,土壤侵蚀总面积减少了 2 818.09 km2,区域土壤侵蚀情况得到有效治理和改善,但侵蚀分布空间差异较大,汶川县、理县、小金县等受强降雨和地质灾害影响,水土流失仍然严重.
Abstract
To comprehensively evaluate soil erosion changes in the western Sichuan and support ecological environment protection and resource development decision-making,as well as provide data for soil erosion investigations,a study on soil erosion change monitoring technology was carried out.Using data from basic geographic monitoring and land change surveys in Sichuan Province,the soil erosion situation in 32 counties and cities in western Sichuan Province from 2019 to 2022 was monitored based on the Chinese Soil Loss Equation(CSLE)model.Results showed that the average soil erosion modulus in the region decreased by 16.88 t/(km2·a)from 2019 to 2022,with a total reduction of 4.1509 million tons in soil erosion and a decrease of 2 818.09 km2 in total erosion area.While regional soil erosion has been effectively managed and controlled,there are significant spatial differences in erosion distribution.Wenchuan,Li,and Xiaojin Counties continue to experience severe soil erosion due to heavy rainfall and geological disasters.
关键词
川西地区/生态环境/CSLE模型/土壤侵蚀Key words
Western Sichuan region/ecological environment/CSLE model/soil erosion引用本文复制引用
基金项目
四川省科技计划项目支持(2023YFS0381)
出版年
2024
NETL
NSTL
万方数据